History & Society
Ptolemy
Egyptian astronomer, mathematician, and geographer
Also known as: Claudius Ptolemaeus, Ptolemy of Alexandria
Category:
History & Society
- Latin in full:
- Claudius Ptolemaeus
- Born:
- c. 100 ce
- Died:
- c. 170 ce
- Notable Works:
- “Almagest”
- “Guide to Geography”
- “Hypotheseis ton planomenon”
- “Optica”
- Subjects Of Study:
- Ptolemaic system
- calendar
- light
- projection
- refraction
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Ptolemy (born c. 100 ce—died c. 170 ce) was an Egyptian astronomer, mathematician, and geographer of Greek descent who flourished in Alexandria during the 2nd century ce. In several fields his writings represent the culminating achievement of Greco-Roman science, particularly his geocentric (Earth-centred) model of the universe now known as the Ptolemaic system. Virtually nothing is known about Ptolemy’s life except what can be inferred from his writings. His first major astronomical work, the Almagest, was completed about 150 ce and contains reports of astronomical observations that Ptolemy had made over the preceding quarter of a century. The size and ...(100 of 1319 words)